Title :
Performance of OFDM with modified RA codes and clipping
Author :
Carson, Neil ; Gulliver, T. Aaron
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Victoria, BC, Canada
Abstract :
A technique for reducing the peak-to-average power ratio (PAPR) of orthogonal frequency-division multiplexing symbols is considered. By extending the method of selected mapping, we achieve PAPR reduction and significant bit error rate improvement. A set of distinct sequences are generated from the data using a modified repeat accumulate code. The sequence with the lowest PAPR is selected for transmission. Using iterative decoding at the receiver, the original data is recovered without prior knowledge of which sequence was selected.
Keywords :
OFDM modulation; codes; error statistics; iterative decoding; modulation coding; sequences; OFDM performance; PAPR reduction; bit error rate; clipping; iterative decoding; modified RA codes; modified repeat accumulate code; orthogonal frequency-division multiplexing; peak-to-average power ratio reduction; receiver; scrambling; selected mapping; sequences; Bandwidth; Bit error rate; Councils; Discrete Fourier transforms; Frequency division multiplexing; High power amplifiers; Iterative decoding; OFDM; Peak to average power ratio; Scholarships;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2003.817333
